Fix iOS crash, storage, and printing issues; setup apk build

src/services/settings.ts

@@ -5,6 +5,19 @@ export interface AppSettings {
   printerIp: string;
   adminPassword: string;
   kioskModeEnabled: boolean;
+  // Photo Frames
+  frameMode: 'off' | 'always' | 'available';
+  selectedFrameId: string | null;
+  // Date/Time overlay
+  dateOverlay: 'off' | 'date' | 'datetime';
+  dateOverlayPosition: 'bottom-right' | 'bottom-left' | 'top-right' | 'top-left' | 'bottom-center';
+  // Event text (shown in date sticker & welcome)
+  eventText: string;
+  // Continuous shooting / burst
+  burstCount: number;        // 1 = single shot, 2–5 = burst
+  burstIntervalSec: number;  // seconds between burst shots
+  // Welcome screen text
+  welcomeText: string;
 }
 
 const settingsFile = new File(Paths.document, 'settings.json');
@@ -14,6 +27,14 @@ const DEFAULT_SETTINGS: AppSettings = {
   printerIp: '192.168.1.100',
   adminPassword: '1234',
   kioskModeEnabled: false,
+  frameMode: 'off',
+  selectedFrameId: null,
+  dateOverlay: 'off',
+  dateOverlayPosition: 'bottom-right',
+  eventText: '',
+  burstCount: 1,
+  burstIntervalSec: 5,
+  welcomeText: 'Willkommen zu unserer Feier!',
 };
 
 /**